Conditional probability occurs when it is given that something has happened. (Hint: look for the word “given” in the question. The probability that a tennis player wins the first set of a match is ...

90 pupils were asked whether they owned a laptop or a tablet device. 52 said they owned a laptop. 45 said they owned a tablet. 23 said they owned both. Find the probability that a pupil chosen at ...

Tough new maths A-levels will be set by Cambridge academics after the university became the first in the country to directly intervene over the "failing" exams system, the Telegraph has learned. By ...